SMA SC 500CP XT Installation - Manual (Page 77)

Torques at panels, covers and grounding conductor:
Position Torque
Grounding conductors on the kick plates 8 Nm to 10 Nm
Mounting the kick plates 2 Nm to 3 Nm
Grounding conductor on the roof 14.2 Nm
Mounting the ventilation grids on the roof 20 Nm
Protective covers 5 Nm
9.3.2 Reduction of DC Input Currents for DC Fuses
The DC inputs are fused with LV/HRC fuses. Thermal stress and alternating loads result in reduction factors which must
be taken into account when designing the DC cables.
The reduction factor 0.70 is applicable for regions where maximum ambient temperatures of 40°C are expected. If
higher ambient temperatures are expected, a reduction factor of 0.64 must be used.
Fusing Maximum DC current I
SC_STC
(reduction factor 0.64 at ambient tem-
peratures exceeding 40°C)
Maximum DC current I
SC_STC
(reduction factor 0.70 at ambient tem-
peratures up to and including 40°C)
125 A 80.0 A 87.5 A
160 A 102.4 A 112.0 A
200 A 128.0 A 140.0 A
250 A 160.0 A 175.0 A
315 A 201.6 A 220.5 A
400 A 256.0 A 280.0 A
When selecting the fuse size, always consider the short-circuit current of the connected PV array at standard test
conditions (I
SC_STC
).
The reduction factors apply for a maximum irradiation of 1,200 W/m 2 (hourly average value of the horizontal global
radiation). In case the irradiation is higher, the reduction factor must be adapted linearly.
9.4 Type Label
The type label clearly identifies the product. One type label is present in the inverter. The type label is located in the
right-hand top corner inside the interface cabinet. You will require the information on the type label to use the product
safely and when seeking customer support. The type labels must be permanently attached to the product.
Reading off the serial number
You can identify the serial number without opening the inverter. The serial number can be found on the roof of the
inverter at the top left. You can also read off the serial number from the touch display.
Reading Off the Firmware Version
You can read off the version number of the inverter and touch display firmware via the user interface. You can
also read off the version number of the touch display firmware on the touch display.
9 Appendix SMA Solar Technology AG
Operating Manual 77 SCCPXT-IA-E4-en-44